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year | consumption | change |
1980 | 1.50 | NA |
1981 | 2.30 | 53.33% |
1982 | 3.00 | 30.43% |
1983 | 4.00 | 33.33% |
1984 | 6.00 | 50.00% |
1985 | 5.20 | -13.33% |
1986 | 6.60 | 26.92% |
1987 | 6.60 | 0.00% |
1988 | 6.60 | 0.00% |
1989 | 6.60 | 0.00% |
1990 | 6.30 | -4.55% |
1991 | 6.10 | -3.17% |
1992 | 6.00 | -1.64% |
1993 | 5.90 | -1.67% |
1994 | 4.70 | -20.34% |
1995 | 4.90 | 4.26% |
1996 | 4.90 | 0.00% |
1997 | 4.90 | 0.00% |
1998 | 4.90 | 0.00% |
1999 | 4.90 | 0.00% |
2000 | 4.60 | -6.12% |
2001 | 4.60 | 0.00% |
2002 | 4.80 | 4.35% |
2003 | 5.70 | 18.75% |
2004 | 5.70 | 0.00% |
2005 | 6.30 | 10.53% |
2006 | 6.70 | 6.35% |
2007 | 6.60 | -1.49% |
2008 | 7.20 | 9.09% |
2009 | 7.00 | -2.78% |
2010 | 7.20 | 2.86% |
2011 | 7.00 | -2.78% |
2012 | 7.00 | 0.00% |
2013 | 7.00 | 0.00% |
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